<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>浏览器兼容性</title>
<style>
	.boxColor{ width:100px; height:100px; background-color:red; }
	*+html .boxColor{ width:200px; height:100px; background-color:blue; }
</style>
</head>
<body>
<div class="boxColor"></div>
</body>
</html>